Vibrational Tamm states at the edges of graphene nanoribbons

Details Vibrational Tamm states at the edges of graphene nanoribbons Vibrational Tamm states at the edges of graphene nanoribbons

2010-01-20

arxiv.org/abs/1001.3457v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 10 figures

Scientific paper

We study vibrational states localized at the edges of graphene nanoribbons. Such surface oscillations can be considered as a phonon analog of Tamm states well known in the electronic theory. We consider both armchair and zigzag graphene stripes and demonstrate that surface modes correspond to phonons localized at the edges of the graphene nanoribbon, and they can be classified as in-plane and out-of-plane modes. In addition, in armchair nanoribbons anharmonic edge modes can experience longitudinal localization in the form of self-localized nonlinear modes, or surface breather solitons.

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